extends ImageEffect

var color := Color.red
var thickness := 1
var pattern := 0
var inside_image := false
var confirmed := false
var shader: Shader

onready var outline_color = $VBoxContainer/OptionsContainer/OutlineColor


func _ready() -> void:
	if OS.get_name() == "HTML5" and OS.get_current_video_driver() == OS.VIDEO_DRIVER_GLES2:
		$VBoxContainer/OptionsContainer/PatternOptionButton.disabled = true
	else:
		shader = load("res://src/Shaders/OutlineInline.gdshader")
	outline_color.get_picker().presets_visible = false
	color = outline_color.color


func _about_to_show() -> void:
	confirmed = false
	if shader:
		var sm := ShaderMaterial.new()
		sm.shader = shader
		preview.set_material(sm)
	._about_to_show()


func _confirmed() -> void:
	confirmed = true
	._confirmed()


func set_nodes() -> void:
	preview = $VBoxContainer/AspectRatioContainer/Preview
	selection_checkbox = $VBoxContainer/OptionsContainer/SelectionCheckBox
	affect_option_button = $VBoxContainer/OptionsContainer/AffectOptionButton


func commit_action(cel: Image, project: Project = Global.current_project) -> void:
	if !shader:  # Web version
		DrawingAlgos.generate_outline(
			cel, selection_checkbox.pressed, project, color, thickness, false, inside_image
		)
		return

	var selection_tex := ImageTexture.new()
	if selection_checkbox.pressed and project.has_selection:
		var selection: Image = project.bitmap_to_image(project.selection_bitmap)
		selection_tex.create_from_image(selection, 0)

	if !confirmed:
		preview.material.set_shader_param("color", color)
		preview.material.set_shader_param("width", thickness)
		preview.material.set_shader_param("pattern", pattern)
		preview.material.set_shader_param("inside", inside_image)
		preview.material.set_shader_param("selection", selection_tex)
		preview.material.set_shader_param("affect_selection", selection_checkbox.pressed)
		preview.material.set_shader_param("has_selection", project.has_selection)
	else:
		var params := {
			"color": color,
			"width": thickness,
			"pattern": pattern,
			"inside": inside_image,
			"selection": selection_tex,
			"affect_selection": selection_checkbox.pressed,
			"has_selection": project.has_selection
		}
		var gen := ShaderImageEffect.new()
		gen.generate_image(cel, shader, params, project.size)
		yield(gen, "done")


func _on_ThickValue_value_changed(value: int) -> void:
	thickness = value
	update_preview()


func _on_OutlineColor_color_changed(_color: Color) -> void:
	color = _color
	update_preview()


func _on_InsideImageCheckBox_toggled(button_pressed: bool) -> void:
	inside_image = button_pressed
	update_preview()


func _on_PatternOptionButton_item_selected(index: int) -> void:
	pattern = index
	update_preview()